Fudge Filling Help!

I made Macsmom's recipe for her fudge filling, and it didn't turn out. Chips melted, everything else creamed, but when I mixed the two together...DISASTER. The chocolate separated, almost seized looking. It's a crumbly mess!!!! Can anyone help me as to what happened? I'd like to save it if I can, that's $10 worth of just chocolate chips in the trash if not Help me please? TIA...and if all else fails, I saw the other thread on fudge filling and I"ll be trying that.